How does the Markush practice relate to unity of invention?
The Markush practice, which involves claiming a group of alternative chemical compounds, is subject to unity of invention requirements in PCT applications. According to MPEP 1850, for Markush groups: Unity of invention is considered to be present when the alternatives are of a similar nature. When the Markush grouping is for alternatives of chemical compounds,…
Read MoreHow does the USPTO handle allegations of unexpected results for chemical compounds?
How does the USPTO handle allegations of unexpected results for chemical compounds? The USPTO has specific guidelines for evaluating allegations of unexpected results, particularly for chemical compounds. According to MPEP 716.02(a)(II): “Evidence that a compound possesses unexpected properties is not sufficient to rebut a prima facie case of obviousness if the prior art suggested that…
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